JPH0730992Y2 - Clutch mechanism of transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a clutch mechanism of a power transmission device.

[Conventional technology]

The transmission bodies are arranged on both sides of the transmission shaft, and the clutch body is arranged in the center. The clutch bodies are brought close to either side of the transmission body, and the surface engaging portions formed on the opposite surface sides are engaged with each other. The clutch mechanism for power connection is very often used in gears and other transmissions.

FIG. 2 shows the first example, but a transmission gear 3 which is constantly engaged with the input side transmission gear 2 is fixedly fitted to one end of the transmission shaft 1 and the transmission gear 4 is mounted on the transmission gear 3. Is loosely fitted, the transmission gear 5 is loosely fitted to the other end, and the clutch body 6 is axially slidably fixedly fitted in the center. In addition,
Surface engaging portions 7, 8, 9, 10 are formed on both sides of the clutch body 6 and on the inner sides of the transmission gears 4 and 5, respectively (here, formed by an outer gear and an internal gear). .
With this, if the clutch body 6 is located in the center,
Although the power transmitted to the transmission shaft 1 is not transmitted to any of the transmission gears 4,5, it is brought closer to one of the transmission gears 4,5 and the respective surface engaging portions 7, 8, 9, 10 are engaged. If it is done, it will be transmitted to the transmission gears 4 and 5 on that side.

FIG. 3 shows a second example, in which the transmission gears 12 and 13 are arranged on both sides of the transmission shaft 11 and the clutch body 14 is arranged in the center, and the surface engaging portions are provided on the predetermined side surfaces thereof. 15,16,1
Forming 7,18 is the same as the first example above,
The point that the clutch body 14 is always meshed with the input side transmission gear 19 and the point that the clutch body 14 is loosely fitted on the transmission shaft 11 (even if the clutch body 14 slides, I try not to disengage.)

[Problems to be solved by the device]

What is common to these is that the clutch bodies 6 and 14 are
Since it slides directly on the top, it is necessary to secure the slide allowance on the transmission shafts 1 and 11. Therefore, the shaft length of the transmission shafts 1 and 11 becomes longer (though the second example is shorter than the first example), and the compactness is lacking.

[Means for Solving the Problems]

Therefore, in this invention, a clutch body having surface engaging portions on both side surfaces is slidably fitted on a transmission shaft, and the same surface is provided on both sides of the clutch body on the side facing the surface engaging portion. In a clutch mechanism of a transmission device in which a transmission body having an engagement portion is provided, the clutch body is slid toward the transmission body side, and power is connected by engaging the double-sided engagement portions, a base metal is provided on the transmission shaft. , And slide the clutch body on this base metal,
In order to secure the slide length, the above-mentioned problem is solved by providing a clutch mechanism of a transmission device in which the base metal is thrust into the transmission body.

[Action]

By adopting this means, the clutch body does not slide directly on the transmission shaft but slides on the base metal fixedly fitted on the transmission shaft. Therefore, the base metal and the transmission bodies on both sides are not attached to each other. It can be installed (it is not necessary to see the slide allowance), and the shaft length of the transmission shaft can be shortened accordingly. And, with this alone, when the clutch body slides to the transmission body side on both sides, it will stick out on the base metal, but at this time, the base metal can also be thrust into the transmission body (of course, without making contact), By doing this, it is possible to prevent the situation of protrusion.

〔Example〕

FIG. 1 shows an embodiment of the present invention. The overall structure is based on the second conventional example described above, and has transmission members 21, 22 on both sides of a transmission shaft 20, and , A clutch body 24, which is always meshed with the input side transmission body 23, is arranged in the center, and surface engaging portions 25, 26, 2 are provided on these predetermined side surfaces, respectively.
Formed 7,28. However, instead of directly fitting the clutch body 24 to the transmission shaft 20, the base metal 29 is fixedly fitted to the transmission shaft 20, and the clutch body is mounted on the base metal 29.
It is made to slide 24. However, if this simple structure is adopted, the clutch body 24 will be transmitted to either of the transmissions 2
When the surface engaging portions 25, 26, 27, 28 are engaged with each other by sliding to the 1, 22 side, the clutch body 24 will stick out on the base metal 29 by that amount. , 2
By forming the recesses 30, 31 and the like on the side surface of 2 and allowing the base metal 29 to project into the recesses 30, 31, the slide allowance can be secured.

[Effect of device]

As described above, the present invention is as described above, that is,
Since the base metal 29 on which the clutch body 24 slides is thrust into the transmission bodies 21 and 22 arranged on both sides and overlaps each other, the base metal 29 corresponding to the sliding amount of the clutch body 24 is sufficient. The length of can be secured.
Therefore, the shaft length of the transmission shaft 20 can be shortened, and a compact design can be achieved. At the same time, the length (width) of the base metal 29 can be made larger than the slide allowance of the clutch body 24 by inserting the base metal 29 into the transmission body 21, 22 as much as possible within the range allowed by the strength. In this case, the width of the clutch body 24 can be increased, and the fall on the base metal 29 can be eliminated, so that the sliding can be smoothly performed.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a gear transmission according to an embodiment of the present invention, and FIGS. 2, 3 are sectional views of an essential part of a conventional gear transmission. (Code) 20 …… Transmission shaft 21 …… Transmission body 22 …… 〃 24 …… Clutch body 25 …… Surface engaging part 26 …… 〃27 …… 〃28 …… 〃29 …… Base metal

Claims (1)

[Scope of utility model registration request] 1. A clutch body (24) having surface engaging portions (25) and (26) formed on both side surfaces is slidably fitted on a transmission shaft (20), and the clutch body (24) is The side engaging portions (25) and (26) are provided on both sides with the same side engaging portions (2
7), (28) forming the transmission body (21), (22),
The clutch body (24) is slid toward the transmission bodies (21) and (22), and the double-sided engaging portions (25), (26) and (2
In a clutch mechanism of a transmission device in which power is connected by engaging (7) and (28), a base metal (29) is fixedly fitted onto the transmission shaft (20), and the clutch body (24) is attached to the base metal (29). (29) A clutch mechanism for a transmission device, which slides on (29) and has the base metal (29) thrust into the transmission bodies (21) and (22) in order to secure the slide length.